def add(x,y):
    s = x+y
    return s

if __name__ == "__main__":
    n = add(2,7)
    
    print(f"我是独立运行的的：{__name__}")
    print("我是程序b,我计算得", n)
else:
    print(f"我是被 import 的：{__name__}")
